Telescopic structure of maglev bridge and maglev bridge including such telescopic structure

Abstract

The present invention discloses a telescopic structure of a maglev bridge and a maglev bridge including the telescopic structure, wherein the telescopic structure includes a joint structure between stator assemblies, the joint structure includes a sunshade and a filler; the sunshade is straddled on two guard plates outside the stator assemblies; the filler is filled in the interval between two adjacent guard plates and connected to the sunshade. The joint structure is arranged at the connection between two adjacent stator assemblies to help the stator assemblies to be waterproof.

Description

Technical Field

[0001] The invention relates to an expansion joint of an offline track bridge in a maglev transportation project, and in particular to a telescopic structure of a maglev bridge and a maglev bridge comprising the telescopic structure. Background Art

[0002] The offline track bridge in the maglev transportation project includes multiple track beams extending longitudinally, and functional components are respectively arranged on both sides of the track beams, and the functional components include stator components that provide longitudinal driving force for the train. The expansion joint of the bridge includes a beam joint between two adjacent track beams and a joint between two adjacent stator components.

[0003] At present, there are many types of telescopic structures set in expansion joints, ranging from simple flexible material filling to Maurer-type beam joint devices. Except for flexible material filling, which can be used for small and medium span expansion joints in maglev transportation, other types are not applicable due to their large scale. The telescopic beams of small and medium span beam joints are relatively small, about 10mm. In addition, in maglev transportation, the telescopic structure has no load-bearing and ballast leakage prevention functions, and is basically used to prevent rainwater from flowing everywhere, that is, it is only required to play a small expansion and waterproof diversion role.

[0004] Generally, the top and side surfaces of the stator assembly are provided with guard plates, and the stator coils and the like are all protected by them. When the stator assembly is longitudinally across the beam seam, the joints between the stator assemblies across the beam seam cannot be too large, otherwise it will affect the normal operation of the motor. Moreover, rainwater will enter the joints between adjacent stator assemblies, and the current protection relies on its own waterproof performance, which has a poor effect. Due to the limitation of small space, the installation and maintenance of the telescopic structure are inconvenient, and it is difficult to install a telescopic device to help the stator assembly waterproof. Summary of the invention

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a telescopic structure of a magnetic levitation bridge and a magnetic levitation bridge including such a telescopic structure.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] An embodiment of the present invention provides a telescopic structure of a magnetic levitation bridge, the telescopic structure comprising a joint structure between stator components, the joint structure comprising a sunshade and a filler;

[0008] The shading plate is connected across the guard plates outside two adjacent stator assemblies;

[0009] The filler fills the space between two adjacent guard plates and is connected to the sunshade.

[0010] In the above solution, the joint structure further includes a first fastener; the first fastener is passed through the filling body and connected to the sunshade.

[0011] In the above solution, a groove is provided at one end of the filling body away from the shading plate.

[0012] In the above solution, the cross-sectional shape of the filler body is a trapezoid; and / or

[0013] The area of ​​the shading plate is larger than the area of ​​the end surface of the filling body close to one end of the shading plate.

[0014] In the above solution, the telescopic structure further comprises a beam gap structure used between non-stator components, and the beam gap structure is located between two adjacent track beams of the bridge;

[0015] The beam seam structure includes a waterproof groove with an upward opening and a water collecting pipe arranged in a vertical direction, wherein the water collecting pipe is connected to the waterproof groove; the two sides of the waterproof groove along the longitudinal direction are respectively connected to the track beam, and the waterproof groove is retractable along the longitudinal direction.

[0016] In the above solution, the beam seam structure further includes a second fastener and a bead extending in the transverse direction, wherein the bead fits the side wall of the waterproof groove; the second fastener is passed through the bead and the side wall of the waterproof groove, and is installed on the track beam; and / or

[0017] The waterproof groove extends outward from the track beam along both ends in the transverse direction.

[0018] In the above scheme, the waterproof groove includes a folding plate and a flexible water barrier, the two sides of the folding plate along the longitudinal direction are respectively connected to the track beam, and the flexible water barrier is installed at both ends of the folding plate along the transverse direction.

[0019] In the above solution, the cross-sectional shape of the folded plate is U-shaped or a frustum-shaped shape that is larger at the top and smaller at the bottom.

[0020] An embodiment of the present invention provides a magnetic levitation bridge, the magnetic levitation bridge comprising a stator assembly, a guard plate, a track beam, and any one of the above telescopic structures;

[0021] The stator assembly is provided at both ends of the track beam in the transverse direction;

[0022] The guard plate is arranged outside the stator assembly, a mounting groove is arranged on the guard plate, and the shading plate is located in the mounting groove.

[0023] In the above solution, the width of the mounting groove along the longitudinal direction is greater than the width of the shading plate along the longitudinal direction.

[0024] In the above solution, the interval between two adjacent track beams includes an entrance portion and an extension portion, and the extension portion is located at the bottom of the entrance portion;

[0025] The width of the expansion portion along the longitudinal direction is greater than the width of the entrance portion along the longitudinal direction;

[0026] The waterproof groove and the water collecting pipe are both located in the extension part.

[0027] In the above solution, the side wall of the track beam includes a step surface extending from the entrance portion to the expansion portion;

[0028] The bridge further comprises a drip trough, which is arranged on the step surface.

[0029] In the above solution, the projection of the guard plate along the vertical direction partially overlaps with the projection of the waterproof groove along the vertical direction.

[0030] The present invention provides a telescopic structure of a maglev bridge and a maglev bridge including such a telescopic structure, wherein a joint structure is arranged at the connection between two adjacent stator assemblies to help the stator assemblies to be waterproof. The sunshade is connected across the guard plates outside the two adjacent stator assemblies to prevent rainwater from entering the joint, and also plays a role in shielding sunlight, preventing the filler from being directly exposed to sunlight, thereby improving the anti-aging property of the filler and extending the service life of the filler. The filler is located in the joint, can adapt to changes in the joint, and further blocks rainwater. When installing the joint structure, it can be inserted into the joint along the horizontal direction of the bridge. When replacing, it can be pulled out first and then inserted, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of an optional structure of a joint structure in a telescopic structure according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of the center seam structure after turning it upside down;

[0033] Figure 3 It is a structural schematic diagram in the longitudinal direction when the beam seam structure in the telescopic structure of an embodiment of the present invention is connected to the track beam;

[0034] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0035] Figure 5 It is a schematic structural diagram in the transverse direction when the beam seam structure in the telescopic structure of an embodiment of the present invention is connected to the track beam;

[0036] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0037] Reference numerals:

[0038] Joint structure 100; guard plate 110; installation groove 111; sunshade 120; filler body 130; groove 131; first fastener 140; first bolt 141; first gasket 142; first nut 143; beam joint structure 200; waterproof groove 210; folding plate 211; flexible water retaining 212; drainage hole 213; second fastener 220; second bolt 221; second nut 222; second gasket 223; water collecting pipe 230; pressure strip 240; track beam 300; extension part 310; support and pad stone 320; pier cap 330; pier body 340; entrance part 350; step surface 351; drip groove 360; stator assembly 400. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by those skilled in the art belong to the protection scope of the present invention.

[0040] In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. "Longitudinal" refers to the length direction of the bridge, which is consistent with the extension direction of the line, and "transverse" refers to the width direction of the bridge, which is perpendicular to the extension direction of the line.

[0041] An embodiment of the present invention provides a telescopic structure of a magnetic levitation bridge, the telescopic structure including a joint structure 100 used between stator assemblies 400, the joint structure 100 including a shading plate 120 and a filler 130; the shading plate 120 is bridged over the guard plates 110 outside two adjacent stator assemblies 400; the filler 130 fills the gap between the two adjacent guard plates 110 and is connected to the shading plate 120.

[0042] The joint structure 100 is located at the connection between two adjacent stator assemblies 400, and is used to prevent rainwater from entering the joint between the two adjacent stator assemblies 400, thereby helping the stator assemblies 400 to be waterproof and prevent rainwater from damaging the stator assemblies 400. Figure 1 As shown, the two ends of the sunshade 120 are respectively connected to the guard plates 110 outside the two adjacent stator assemblies 400, straddling the joint to prevent rainwater from entering the joint. The filler 130 fills the joint and is connected to the bottom of the sunshade 120, further preventing rainwater from entering the joint.

[0043] The filler body 130 is generally made of elastic material, such as rubber, to better adapt to the changes in the joints.

[0044] The sunshade 120 is made of an opaque material, such as a metal plate such as a steel plate, so as to prevent direct sunlight from shining on the filling body 130, thereby improving the anti-aging property of the filling body 130, and the joint structure 100 is simple in structure and durable.

[0045] The sunshade 120 can be installed in the installation groove 111 on the guard plate 110 described below. Figure 1 As shown, the top of the sun visor 120 is flush with the guard plate 110 to better maintain the integrity of the sun visor 120 and the guard plate 110.

[0046] In vertical height, the overall height of the joint structure 100 is preferably not higher than the height of the guard plate 110. Preferably, a groove 131 is provided at one end of the filler body 130 away from the sunshade 120. The presence of the groove 131 prevents the filler body 130 from overflowing when adapting to the change of the joint.

[0047] The shape and number of the grooves 131 can be adjusted as required. For example, a groove 131 is provided at the bottom of the filler body 130. Figure 1 and Figure 2 The arc groove 131 shown. For another example: the bottom of the filler body 130 is provided with more than two arc grooves 131, or the bottom of the filler body 130 is provided with at least one rectangular groove, or at least one triangular groove.

[0048] Without limitation, the cross-sectional shape of the filler body 130 is a trapezoid. The trapezoidal filler body 130 is more conducive to being clamped by the two side guard plates 110, ensuring that the filler body 130 will not fall off. The cross-sectional shape of the clamped filler body 130 can be a trapezoid with a small top and a large bottom, but preferably, the cross-sectional shape of the filler body 130 is as follows: Figure 1 The trapezoid shown is small at the top and large at the bottom.

[0049] It is understandable that the cross-sectional shape of the filler body 130 is not limited to that described above, and the shape of the joint needs to match the shape of the filler body 130 .

[0050] Furthermore, the area of ​​the sunshade 120 is larger than the end surface area of ​​the filler 130 near one end of the sunshade 120. This ensures that the sunshade 120 completely covers the joints between the stator assemblies 400 and prevents the top of the filler 130 from being exposed, thereby further improving the rain blocking effect.

[0051] When installing the joint structure 100, it can be inserted into the joint along the bridge horizontally. When replacing, it can be pulled out first and then inserted. The installation and maintenance are simple and convenient.

[0052] The sunshade 120 and the filling body 130 can be connected by bonding, embedding, etc., or by fasteners. Specifically, the joint structure 100 further includes a first fastener 140 ; ​​the first fastener 140 is disposed through the filling body 130 and connected to the sunshade 120 .

[0053] Further, the first fastener 140 includes a first bolt 141, a first nut 143 and a first gasket 142. Figure 1 As shown, the first bolt 141 is passed through the filler body 130, and one end of the first bolt 141 is connected to the sunshade 120; the first nut 143 is sleeved on the other end of the first bolt 141, and the first gasket 142 is sleeved outside the first bolt 141, and one end of the first gasket 142 is abutted against the filler body 130, and the other end is abutted against the first nut 143.

[0054] The shading plate 120 is connected to the packing body 130 as a whole through the first fastener 140, which is convenient for installation. One end of the first bolt 141 can be connected to the shading plate 120 by welding, and the other end is threadedly connected to the first nut 143, which is convenient for installation. The first gasket 142 can increase the contact area with the packing body 130 and prevent the first nut 143 from loosening.

[0055] It is understandable that the first bolt 141 may be replaced by a screw, a stud or the like.

[0056] In some embodiments of the present invention, the telescopic structure also includes a beam seam structure 200 used between non-stator components, and the beam seam structure 200 is located between two adjacent track beams 300 of the bridge; the beam seam structure 200 includes a waterproof groove 210 with an upward opening, and a water collecting pipe 230 arranged in a vertical direction, and the water collecting pipe 230 is connected to the waterproof groove 210; the waterproof groove 210 is respectively connected to the track beam 300 on both sides along the longitudinal direction, and the waterproof groove 210 is telescopic along the longitudinal direction.

[0057] The beam gap structure 200 is located in the beam gap between two adjacent track beams 300, and is used to adapt to the changes in the beam gap and to guide rainwater to prevent it from flowing everywhere. Figures 3 to 5 As shown, rainwater enters the waterproof groove 210 through the inlet 350 described below, and then flows downward through the water collecting pipe 230. The water collecting pipe 230 can sequentially pass through the support and cushion stone 320, the pier cap 330 and the pier body 340 below the track beam 300 to drain the rainwater below the pier body 340, so as to prevent the rainwater from invading the support and cushion stone 320 and polluting the appearance of the track beam 300. The two sides of the waterproof groove 210 along the longitudinal direction are respectively connected to the track beam 300, ensuring that the rainwater entering the beam gap falls into the waterproof groove 210. The waterproof groove 210 can be retracted along the longitudinal direction to adapt to the changes in the beam gap and extend the service life of the beam gap structure 200.

[0058] Preferably, the waterproof groove 210 extends outward from the track beam 300 along both ends in the lateral direction. Both ends of the waterproof groove 210 can be extended as far as possible toward the stator assembly 400, so as to have sufficient "overlap" with the guard plate 110, and drain rainwater that may enter through the gap between the guard plate 110 and the track beam 300. It should be noted that "overlap" here does not mean contact with each other, but that the projections of the guard plate 110 and the waterproof groove 210 in the vertical direction overlap.

[0059] In some embodiments of the present invention, the waterproof groove 210 includes a folding plate 211 and a flexible water retaining member 212 . The folding plate 211 is connected to the track beam 300 at both sides along the longitudinal direction, and the flexible water retaining member 212 is installed at both ends of the folding plate 211 along the transverse direction.

[0060] The folding plate 211 penetrates the beam seam in the transverse direction and defines the side walls of the waterproof groove 210 in the longitudinal direction. The folding plate 211 is retractable in the longitudinal direction, and the flexible water retaining 212 can prevent the accumulated water in the folding plate 211 from overflowing to both ends without affecting the retractability of the folding plate 211.

[0061] Without limitation, the folding plate 211 is formed by bending a metal plate, and the metal plate is preferably a thinner copper sheet, and more preferably a red copper sheet, so that when the beam gap changes, the folding plate 211 has better expansion and contraction performance and is durable.

[0062] Without limitation, Figure 3 and Figure 4 As shown, the folded plate 211 is connected to the water collecting pipe 230 through the drainage hole 213 at the bottom. The cross-sectional shape of the folded plate 211 is roughly U-shaped, or roughly frustum-shaped, with the frustum being larger at the top and smaller at the bottom. In this way, when the beam gap changes, the frustum-shaped or U-shaped folded plate 211 can be slightly opened or closed, and the height of the folded plate 211 can be selected according to the expansion and contraction amount of the beam gap to control the opening or closing angle not to be too large to affect its durability.

[0063] Furthermore, the telescopic structure also includes a second fastener 220 and a pressure strip 240 extending in the transverse direction, the pressure strip 240 is in contact with the side wall of the waterproof groove 210; the second fastener 220 is passed through the pressure strip 240 and the side wall of the waterproof groove 210, and is installed on the track beam 300.

[0064] like Figure 5 and Figure 6As shown, the second fastener 220 includes a second bolt 221, a second gasket 223 and a second nut 222. The second bolt 221 penetrates the side wall of the waterproof groove 210 and the pressure strip 240 in sequence to fix the waterproof groove 210 on the track beam 300. If the waterproof groove 210 has the above-mentioned folding plate 211, the second bolt 221 is provided with the folding plate 211 and the pressure strip 240 in sequence. One side of the pressure strip 240 is in contact with the side wall of the waterproof groove 210, and the other side is in contact with the second gasket 223. The second nut 222 and the second gasket 223 are both sleeved outside the second bolt 221, and the second gasket 223 is located between the pressure strip 240 and the second nut 222. The second nut 222 is threadedly connected with the second bolt 221 to fasten the installation of the waterproof groove 210.

[0065] The second bolt 221 is a bolt pre-buried in the track beam 300. Figure 5 As shown, in the horizontal direction, the two side walls of the waterproof groove 210 are respectively provided with a plurality of second fasteners 220. The pressure strip 240 is a full-length pressure strip 240 that runs through the beam seam in the horizontal direction, and is used to transmit the fastening force from the second nut 222, so as to prevent the pressure area of ​​the side wall of the waterproof groove 210 from being too concentrated, and protect the side wall of the waterproof groove 210 from being damaged.

[0066] The joint structure 100 and the beam joint structure 200 of the embodiment of the present invention can be used on a magnetic levitation bridge separately or in combination.

[0067] An embodiment of the present invention also provides a magnetic levitation bridge, which includes a stator assembly 400, a guard plate 110, a track beam 300, and any one of the above-mentioned joint structures 100; the stator assembly 400 is provided at both ends of the track beam 300 in the transverse direction; the guard plate 110 is arranged outside the stator assembly 400, and an installation groove 111 is provided on the guard plate 110, and the sunshade 120 is located in the installation groove 111.

[0068] like Figure 1 and Figure 5 As shown, a mounting groove 111 is provided on the top of the guard plate 110, and the sunshade 120 is located in the mounting groove 111. The guard plate 110 is generally a steel plate.

[0069] Furthermore, in order to adapt to the change of the joint, the width of the installation groove 111 along the longitudinal direction is greater than the width of the shading plate 120 along the longitudinal direction. Figure 1 As shown, the mounting groove 111 has a margin to accommodate the expansion and contraction of the joint.

[0070] An embodiment of the present invention also provides a magnetic levitation bridge, which includes a track beam 300 and any one of the above-mentioned beam seam structures 200; the interval between two adjacent track beams 300 includes an entrance portion 350 and an extension portion 310, and the extension portion 310 is located at the bottom of the entrance portion 350; the width of the extension portion 310 along the longitudinal direction is greater than the width of the entrance portion 350 along the longitudinal direction; the waterproof groove 210 and the water collecting pipe 230 are both located in the extension portion 310.

[0071] In order to facilitate the installation of the beam seam structure 200, the beam seam can be processed by retaining the original gap, i.e. the entrance portion 350, in the interval between two adjacent track beams 300, and then expanding the gap below the entrance portion 350 to form an extended portion 310, and the beam seam structure 200 is located in the extended portion 310.

[0072] Furthermore, the side wall of the track beam 300 includes a step surface 351 extending from the entrance portion 350 to the extension portion 310; the bridge also includes a drip groove 360, which is arranged on the step surface 351, and the drip groove 360 ​​is located outside the projection of the second fastener 220 in the vertical direction.

[0073] like Figure 3 and Figure 4 As shown, the projections of the drip groove 360 ​​and the second fastener 220 in the vertical direction do not overlap, and rainwater entering from the inlet 350 cannot pass through the drip groove 360 ​​and falls at the drip groove 360, thereby reducing or even avoiding the erosion of the second fastener 220 by rainwater.

[0074] An embodiment of the present invention also provides a magnetic levitation bridge, which includes a stator assembly 400, a guard plate 110, a track beam 300, and any one of the above-mentioned joint structures 100 and beam seam structures 200; the track beam 300 is provided with a stator assembly 400 at both ends in the transverse direction; the guard plate 110 is arranged outside the stator assembly 400, and the guard plate 110 is provided with a mounting groove 111, and the sunshade 120 is located in the mounting groove 111; the interval between two adjacent track beams 300 includes an entrance portion 350 and an extension portion 310, and the extension portion 310 is located at the bottom of the entrance portion 350; the width of the extension portion 310 in the longitudinal direction is greater than the width of the entrance portion 350 in the longitudinal direction; the waterproof groove 210 and the water collecting pipe 230 are both located in the extension portion 310.

[0075] Preferably, the projection of the guard plate 110 along the vertical direction partially overlaps with the projection of the waterproof groove 210 along the vertical direction.

[0076] The guard plate 110 is suitable to extend in the direction of the track beam 300 , and both ends of the waterproof groove 210 can be extended as far as possible in the direction of the stator assembly 400 to further ensure that the guard plate 110 and the waterproof groove 210 have sufficient “overlap”.

[0077] Furthermore, in this embodiment, the side wall of the track beam 300 is also provided with the above-mentioned step surface 351 and the drip groove 360.

[0078] In this embodiment, a waterproof joint structure 100 used between stator assemblies 400 and a drainage beam joint structure 200 used between non-stator assemblies are provided simultaneously, which can not only isolate the magnetic levitation stator assemblies from possible rainwater invasion, but also can concentrate and drain the rainwater entering the beam joints to below the bridge piers.

[0079] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0080] The joint structure 100, the beam joint structure 200 and other structures and operations of the magnetic levitation bridge according to the embodiment of the present invention are understandable and easy to implement for those skilled in the art, and thus will not be described in detail.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A telescopic structure of a magnetic levitation bridge, characterized in that: The telescopic structure includes a joint structure for stator components, and the joint structure includes a shading plate and a filler body; The shading plate is connected across the guard plates outside two adjacent stator assemblies; The filler fills the space between two adjacent guard plates and is connected to the sunshade.

2. The telescopic structure according to claim 1, characterized in that: The joint structure further includes a first fastener; the first fastener is passed through the filling body and connected to the sunshade.

3. The telescopic structure according to claim 1, characterized in that: A groove is provided at one end of the filling body away from the shading plate.

4. The telescopic structure according to claim 1, characterized in that: The cross-sectional shape of the filler body is a trapezoid; and / or The area of ​​the shading plate is larger than the area of ​​the end surface of the filling body close to one end of the shading plate.

5. The telescopic structure according to claim 1, characterized in that: The telescopic structure further comprises a beam gap structure for use between non-stator components, wherein the beam gap structure is located between two adjacent track beams of the bridge; The beam seam structure includes a waterproof groove with an upward opening and a water collecting pipe arranged in a vertical direction, wherein the water collecting pipe is connected to the waterproof groove; the two sides of the waterproof groove along the longitudinal direction are respectively connected to the track beam, and the waterproof groove is retractable along the longitudinal direction.

6. The telescopic structure according to claim 5, characterized in that: The beam seam structure further includes a second fastener and a pressure strip extending in the transverse direction, wherein the pressure strip is in contact with the side wall of the waterproof groove; the second fastener is passed through the pressure strip and the side wall of the waterproof groove, and is installed on the track beam; and / or The waterproof groove extends outward from the track beam along both ends in the transverse direction.

7. The telescopic structure according to claim 5, characterized in that: The waterproof groove comprises a folding plate and a flexible water retaining plate. The two sides of the folding plate along the longitudinal direction are respectively connected to the track beam, and the flexible water retaining plate is installed at the two ends of the folding plate along the transverse direction.

8. The telescopic structure according to claim 7, characterized in that: The cross-sectional shape of the folding plate is U-shaped or a frustum shape that is larger at the top and smaller at the bottom.

9. A magnetic levitation bridge, characterized in that: The magnetic levitation bridge comprises a stator assembly, a guard plate, a track beam, and a telescopic structure according to any one of claims 1 to 4; The stator assembly is provided at both ends of the track beam in the transverse direction; The guard plate is arranged outside the stator assembly, a mounting groove is arranged on the guard plate, and the shading plate is located in the mounting groove.

10. The bridge according to claim 9, characterized in that: The width of the mounting groove along the longitudinal direction is greater than the width of the shading plate along the longitudinal direction.

11. A magnetic levitation bridge, characterized in that: The bridge comprises a track beam and a telescopic structure according to any one of claims 5 to 8; The interval between two adjacent track beams includes an entrance portion and an expansion portion, and the expansion portion is located at the bottom of the entrance portion; The width of the expansion portion along the longitudinal direction is greater than the width of the entrance portion along the longitudinal direction; The waterproof groove and the water collecting pipe are both located in the extension part.

12. The bridge according to claim 11, characterized in that The side wall of the track beam includes a stepped surface extending from the entrance portion to the expansion portion; The bridge further comprises a drip trough, which is arranged on the step surface.

13. The bridge according to claim 11, characterized in that: The bridge further comprises a stator assembly and a guard plate, wherein the stator assembly is disposed at both ends of the track beam in the transverse direction; and the guard plate is disposed outside the stator assembly; The guard plate is provided with a mounting groove, and the shading plate is located in the mounting groove; The projection of the guard plate along the vertical direction partially overlaps with the projection of the waterproof groove along the vertical direction.

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